Stock cutting mechanism



N. RUBi STOCK CUTTING MECHANISM l4 Sheet s-Sheet 1 Filed Nov. 11, 1932 I 'INVENTEIR BY fl ATT RNEYS Oct 29, 1935. N. R UBiN 2,019,465

STOCK CUTTING MECHANISM Filed Nov. 11, 1932 14 Sheets-Sheet 2 INVENTOR mm m M4 M ATTOR N EYS Oct. 29, 1935'. N. RUBIN 2,019,465

' STOCK CUTTING MECHANISM Filed Nov. ll, 1932 14 Sneaks-Sheet 5 BY AT ORNEYS N. RUBEN Oct. 29, 1935.

STOCK CUTTI NG MECHANISM Filed Nov. ll, 1932 14 Sheets-Sheet 4 ATT RN EY I 3 INVENTUR Mimi MM w r v 2 a mm 14 Sheet-Sheet 5 Filed Nov. 11, 1952 5 1/ \B n W. v om. n q E R 5 .3. U I1 21 M N R N 0, R it a! ET 0 m a v m 7/ I J 75 v) \4 N A M un I y E 5 NS.

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STOCK CUTTING MECHANISM 14 Sheets-Sheet 6 Filed Nov. 11, 1932 zza 11 21; IN VENTUR YIMM MM x M ATTORNEYS N. RUBIN Oct. 29, 1935.

STOCK CUTTING MECHANISM Filed Nov. 11, 1932 l4 Sheets-Sheet '7 Z34 I m 29 INVENTOR By TIM QLJM v ATTORNEYS Oct. 29, 1935. N, RUB|N 2,019,465

STOCK CUTTING MECHANISM Filed N v. 11, 1932 14 Sheets-Sheet 8 7 O O [NVENTOA MMMM HTTORNEY Oct. 29, 1935.

N. RUBIN STOCK CUTTING MECHANI SM Filed Nov. 11, 1932 14 Sheetsi-SheetS Q 1 M: $$N

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STOCK CUTTING MECHANISM Filed Nov. 11, 1932 14 Sheets-Sheet 10 u @N h wm m 0a; 29, 1935. N, RUBlN 2,019,465

STOCK CUTTING MECHANI SM Filed Nov. 1]., 1932 14 Sheets-Sheet l1 INVENTOR 4 TT'ORNE Y5 Oct. 29, 1935. N. RUBEN 2,019,465

STOCK CUTTI NG MECHANISM Filed Nov. 11, 1932 14 Sheets-Sheet 12 INVENTOR IYIMWM BY w 4 M f) TTOENE Y5 Oct. 29, 1935. N. RUBIN 2,019,465

STOCK CUTTING MECHANISM Filed Nov. 11, 1952 '14 Sheet'-Sheet 15 INVENTOR 8 m W M ATTORNEYS Oct. 29, 1935. RUBiN 2,019,465 Y STOCK CUTTING MECHANISM Filed Nov. 11, 1952 14 Sheets-Sheet l4 INVENTOR Patented Oct. 29, 1935 PATENT OFFICE 2,019,465 s'rooK CUTTING MECHANISM Norbert Rubin, Cleveland, Ohio, assignor to McKinney Tool & Manufacturing Company, Cleveland, Ohio, a corporation of Ohio Application November 11, 1932, Serial No. 642,230

8 Claims. (CI. 29-69) This invention relates to stock cutting mechanism and in particular to such devices as will out metal bars and strips either solid or of rolled sheet section,into predetermined, variable lengths, as they are fed to the device from either a rolling machine or other feeding means.

Numerous attempts have been made to cut metal stock into predetermined lengths automatically as it is fed into the cutting device without arresting the feed of the stock. A typical device for this kind is the flying shear design used for many years, where steel bars are fed into the shear, at specified intervals a gripping mechanism attaching itself to the moving material to carry the shear and its component operating mechanism along with the stock, so that as the shear contacts with the stock incident to its cutting cycle, both the shear and the stock will be traveling at the same speed. As soon as the out has been made, the gripping device will release contact with the stock, the stock continuing movement, while the shear returns to starting position, all ready for a second cutting operation, when again the desired length of stock shall have passed the shear. This is an old form ofmechanism and familiar to all skilled in this art.

It will be evident that with this form of mechanism that only heavy bars rigid enough to carry the shear and its associated mechanism, can be cut. In mypresent invention, I have provided a cutting mechanism whereby the cutting means is brought to a speed exactly equal to that of the stock, without its having actual contact with the stock. In other words the stock that is to be cut travels thru my mechanism and at predetermined intervals the cutting mechanism will travel with the stock at its exact rate of speed, for that period of time that is required for the mechanism to make the cut. The cutting mechanism will then return to its starting point, ready for a second out which occurs as soon as additional stock has passed thru the mechanism in the amount required. It will be evident that with my device,

as the movement of the cutting mechanism is not dependent upon the stock for its movement, that the size and strengtlof the stock does not have a bearing upon the operation of the mechanism. It will be evident that very light sections can be cut, such as would beimpossible with the flying shear designs above first described. This is one of the important objects of my invention.

Another form of cutting mechanism that has been built at various times is that one where the stock abuts with a fixed surface at its end when a cut is'desired. The feeding rolls that 'will be even slightly less.

are pushing the stock .into the cutting mechanism will then slip during that period of time that the stock remains at rest, incidentvto the cutting operation. It is evident that with this form of mechanism, the feed rollers revolving on the stationary stock will mar the stock and that also the stock must be of substantial size to enable action of this nature.- In my invention the cutting mechanism reciprocates with the traveling stock at the exact speed of the stockeliminating 10 the above described marring efiect.

Another important object of the invention is to provide a cutting mechanism that will attach to the delivery end of a cold roll forming machine whereby the formed section as delivered by the rolling machine will be cut to predetermined lengths, without a stopping of the rolling machine. In making formed sections from sheet metal by the use of a cold rolling machine, the speed at which the formed sections emerge at the delivery end of the rolling machine is generally slightly greater than that speed that would normally be present due to the peripheral speed. of the rolls. In some cases the emerging speed this speed variation will be substantially constant for sections of like formation, size and sectional area, but that as the section and formation vary when rolls are-changed in the rolling machine so may the emerging speed change. ,One condition that will cause a variance in the emerging speed is a change in the initial thickness'of the stock being rolled. For instance the stock in one coil may be a few thousandths of-an inch thicker than the stock of a previous coil. In such an event, this added thickness will have to be rolled out causing a greater emerging speed. Again the stock may run a little thin in which event the emerging speed will be slightly reduced. When my cutting mechanism is attached to a cold roll-' 40 ing machine, it is evident that it is desirable to take its drive from some driven portion of the rolling machine. I have shown in my present disclosure two forms of rolling machines, one the conventional all spur gear driven type and another the worm and gear driven type. It is immaterial which form of rolling machine is connected with my present invention. My cutting mechanism is arranged to receive a constantnormal driving speed from the fixed R. P. M. of that portion of the associated rolling machine to which the hook-up is made. Also the reciprocating speed of my cutting mechanism with the moving stock is made variable so as to compensate for variable emerging speeds of the stock. I' have 5 It will be evident that 25 controllable and this forms one of the important objects of my invention.

In the main form of my present disclosure I have shown my mechanism receiving stock from a rolling machine and cutting it into lengths. However, with my arrangement it is also possible to place the mechanism at the feed end of the rolling machine, whereby it can take raw stock from a coil or reel, and deliver it into the rolling machine in cut lengths.

I have also shown the mechanism with an individual motor drive. -This form would be desirable when the cutter is not connected to an associated machine such as a rolling-mill from which it can receive operative .power. In many instances the mechanism will be used to take raw stock from any source and merely cut it into given lengths. This arrangement of extreme flexibility of application is an important object of the disclosure.

Another object is to provide for the operation of the cutting mechanism, a power pickup that will take the full operating power from the driving means, for operation thereof substantially instantly after the exact amount of stock has been fed thru it. It will be evident that if a variable time is present as the cutting cycles get into operation that error in the length of the cut pieces will result. I have found it desirable in most instances to use the forward end of the piece being cut as a means of tripping a trigger for starting the operation of the cutting cycle. While the operative engagement of my power pickup with its power source is for all practical purposes instantly and uniformly contacted, yet a certain amount of time may elapse between the start of a cutting cycle and the actual out. If any variation occurs during this time in the rate at which the stock feeds into the cutting mechanism error in length of cut will result, as control of the length is broken after the trigger contacts with the end of the piece. The rate at which the stock feeds into the cutting mechanism may for instance be varied by slippage on the rolls of the rolling machine. Or if the cutter is merely receiving stock from a reel etc., the feeding pinch rolls may slip etc. With this in mind I have made provision of means that not only provide a substantially instant operative power pickup, but means that reduce to a minimum the time elapsing for a completion of the actual cut of the stock. This particular design in mimechanism, enabling a cut to close overall limits, is new to the best of my knowledge and belief in the art to which my invention appertains and this has been made the important basis for part of my appended claims. Without instant, uniform operative contact between the power pickup of the cutter, and the source supplying this power, no close tolerances could be maintained. Closely maintained overall limits of the lengths being cut is of paramount importance. Without close limits the useof any cutting mechanism is greatly restricted. Accordingly, it is another object of my invention to provide, in a mechanism for cutting advancing stock to predetermined lengths, the combination of essential attributes close tolerances in operating parts, speed of operation to reduce time lag to a minimum, flexibility of operation to accommodate variations in stock speed, adjustment to vary the predetermined length of stock cut, a range of operation adapted to stock of practically any gage, size or shape.

Heretofore, stock formed in cold rolling mamade this speed adjustment easily accessible and chines has been cut to lengths manually after leaving the machine. It is an object of my invention to provide a stock cut-ofl mechanism which may be attached to any of various cold rolling mills and which is adapted to cut stock 5 of various sizes and shapes to predetermined lengths, the mechanism being flexible and adjustable to accommodate various sizes and shapes of stock. By providing a cutter mechanism operative without stopping the advance of the 10 stock and cutter mechanism adjustable for all variable stock sections, a substantial reduction in operating costs is eiIected.

Another object of the invention is to provide a cutter mechanism that oilers no retarding ef- 15 1 feet to the oncoming flow of stock. In rolling many sections, if the stock is made to do work after it leaves the final pass, it may cause a distortion that may ruin the shape of the section.

Another object of the invention is to provide 20 means of confining the stock being cut adjacent to each side of the cut, the confining means being arranged to reciprocate with the cutting means at the exact stock speed during the cut- I ting operation. 25

Another object is to provide in a trigger release a very sensitive mechanism so that the stock (in performing work by acting at its outer end on the trigger) can be of long slender proportions, the work eifect being reduced to a 30 minimum to reduce the column stress effect on the piece of stock.

Another, result obtainable by close cutting tolerances is the saving of stock. If the lengths out are permitted to run a little long; during a 35 large run of lengths, the waste is considerable. This new and valuable result of close cutting limits as before referred to is dependent upon the substantially instant power engagement of my mechanism with its driving source, at the be- 0 ginning of each operative cycle of the mechanism.

Another object of the invention is to provide in combination therewith, an unloader mechanism that will take either long or short peices of stock 5 and deposit them in a uniform pile at the side of the unloader or onto any conveyor form of removing means. Without an unloader it is evident that the pieces as cut would fall haphazardly, end down, in all directions. 50

Further objects and advantages of the invention are apparent from the following detailed description. While the invention in its broader aspect is capable of embodiment in various forms,

a preferred embodiment thereof, and of the mechanisms forming the same, are illustrated in the accompanying drawings, in which:

Fig. 1 is an elevation of one embodiment of the mechanism with a portion of a cold rolling machine attached to the drive end thereof, with some portions removed, and sections removed.

Fig. 2 is a section taken along the line 2-2 in Fig. 1 with portions removed.

Fig. 3 is a section taken along line 3-3 in Fig. 1, with portions removed. 5 Fig. 4 is a section taken substantially along the line 4-4 in Fig. 1, with portions removed,

and in an enlarged scale from that of Fig. 1.

Fig. 5 is a section taken along the line 55 in Fig. 4. 7

Fig. 6 is a view of a part of the driving mechanism in one position, withportions removed and in section.

Fig. 'I is a plan view of a portion of the drive shown in Fig. 6 with portions removed and in 15 section, and taken alongthe line I-l i'n.Fig. 6.

, Fig. 8 is a similar view of that of Fig. 6 with the exception that the parts are shown in a different operative position.

Fig. 9 is a side view of the mechanism shown in Fig. 8, with portions removed.

Fig. 10 is a view of the opposite side, to that shown in Fig. 9, with portions removed.

Fig. 11 is a view of another portion ofv the driving mechanism, with portions removed and in section.

Fig. 12 is a section taken along the line l2-l2 in Fig. 11 with portions omitted.

Fig. 13 is a section thru part of the drive containing the clutch, and taken in part along the line 4-4 in Fig. 1, the section being shown in an enlarged scale.

Fig. 14 is a section in part along line "-14 in Fig. 13, with portions removed.

Fig. 15 is a. section along line l5-l5 in Fig. 13, with portions removed.

Fig. 16 is an enlarged view of a section of the drive taken along line l6-i6 in Fig. 1, with portions removed.

Fig. 17 is a section taken along line lI-ll in Fig. 16, with portions removed.

Fig. 18 is a section taken along the line l8-i8 in Fig. 13, with portions removed.

Fig. 19 is an enlarged plan view of the stock clamping mechanism taken along the line iii-l9 in Fig. 1, with portions removed.

Fig. 20 is a section taken along the line 20-20 in Fig. 19, with sections removed. 1

Fig. 21 is a section taken along the line 2i-2l in Fig. 19 with sections removed.

Fig. 22 is an enlarged view of the rear end of the unloader mechanism, taken along the line 22-22 in Fig. 1, with portions removed.

Fig. 23 is a side elevation of a portion of the mechanism shown in Fig. 22, and taken along the line 23-23 in Fig. 22;

Fig. 24 is another view of a portion of the mechanism shown in Fig. 22, but in a different operative position.

Fig. 25 is an enlarged view of the operating mechanism for operating the arrangement shown in Figs. 19 to 21, inclusive.

. Fig. 26 is a plan view of a portion of the unloader arrangement, with portions removed.

Fig. 27 is a view of a portion of the mechanism driving the unloader, with portions in section and portions removed.

Fig. 28 is a sectional elevation of a portion,

of the unloader mechanism with a portion of the clutch releasing mechanism shown thereupon, and taken along the line 28-28 in Fig. 30.

Fig. 29 is a side elevation of the mechanism shown in Fig. 28 with portions removed and in section.

Fig. 30- is a partial section taken along the line 30-30 in Fig. 28 portions being cutaway and others not in section. v

Fig. 31 is a partial section also taken along the line 30-30 in Fig. 28 but with certain operative portions thereon in a different operative position from that shown in Fig. 30.

Fig. 32 is another partial section taken along the line 30-30 in Fig. 28 with the operative Fig. 1.

manner from that illustrated by Fig. 1, portions being left off and in section. Y v

Fig. 35 is a partial section taken along the line 35-35 in Fig. 34, with portions left 01!.

Fig. 36 is a partial view of certain operative 5 portions of the mechanism shown in still a different manner from that disclosed in Fig. 1 and in Fig. 1 with portions broken away and in section. i

Fig. 40 is a plan view of a portion mechanism shown in Fig. 18.

Fig. 41 is a partial sectional view taken along line 4l-4l in Fig. 1.

Fig. 42 shows an optional method of driving my mechanism from that method shown in of the Fig. 43 shows still another optional method of driving the mechanism. 4 I

Fig. 44 is a view along line 44-44 in Fig. 43 with portions removed and others in section.

Fig. 45 is a section along line 45-45 in Fig. 30 43 portions being removed.

Fig. 46 shows an optional method of driving one unit of the mechanism, portions being re- Fig. 49 is a a plan view of a portion of the 40 I mechanism shown in Fig. 36, portions being removed and others in section.

Fig. 50 is a sectional view along line 50-50 in Fig. 29.

Fig. 51 is a view similar to that of Fig. 23 but 45 with the mechanism in a different operative position. d v v Fig. 52 is a partial view of one side of the mechanism similar to that shown in Fig. 1 but with the mounting of the unit shown adjustable. 50

Fig. 53 is a section taken along the line 53-53 in Fig. 52, portions being removed.

Fig. 54 is a. section along the line 54-54 in Fig. 53 with portions removed.

Referring to the drawings, l, (Figs. 1 and 39) designates the bed of a. conventional form rolling 'machine, to which I have shown attached the mechanism comprising my present invention. Mounted for rotation in bearings 2, carried by housing l2 is a worm shaft 3, a worm 4, being 50 made a part 'of the shaft at a point intermediate the bearings. In driven relation to the worm 4, is a worm gear 5, the gear being fixed to a shaft 6, mounted for rotation in bearings formed in the sides of a housing i2. One end of shaft 6 extends thru one side of the housing, and has fixed thereon, at a point external the housing, a roll 8. Extending past roll 8 is a further extension of the shaft 6, which is mounted for rotation in a bearing formed in outboard housing, l3. Intermediate the one'wall of the housing l2,

and the worm gear 5, is fixed to the shaft 6 a spur gear I. Meshing with the gear 1 is a sec- 0nd gear 9, keyed to one end of a. shaft ill. The opposite end of shaft in is mounted in a bearing block I4, slidably mounted in ways internal of .the upper end of the outboard housing |3.- Adjacent one side of the gear 9 is a second bearing block I5, slidably mounted in ways in the adjacent wall of housing I2. Intermediate the bearing blocks I4 and I5, and keyed to shaft I8 is a second roll Arranged to bear against the bearing blocks to enable forcing the rolls 8 and II together, and with threaded engagement in the top of housings I2 and I3, are set screws l6 and I1. It is evident that as the screws I6 and I1 are screwed in, that the rolls will be brought together and that as they are screwed out that the rolls can be separated. It will be evident that as shaft 3 is rotated that the worm gear drive will rotate shaft 6 and roll 8 and that this rotation will then be also imparted thru.

the spur gear train to the shaft I from which the associated roll II will receive rotation. It is evident that as the roll 8 revolves in direction of e the arrow I8 (Fig. 1) and the roll II in the direction of arrow I9 that stock disposed between the two rolls as indicated by 26 will be passed from the rolls in the direction of the arrow 2|.

The rolls 8 and I I and their associated driving mechanism constitute the last pass on the rolling machine. It will be evident that for each pass a similar arrangement will be required. It is also evident that the shaft 3 will therefore be extended back and at stated intervals will have driving members, not shown, for the various other passes, also not shown, receiving power from it. It is evident that shaft 3 at some point intermediate its ends will receive its driving effect from a source of motive power, such as electric motor, etc., in the usual conventional manner. The continuation of this rolling machine and its associated driving mechanism is not here shown or further described as this rolling machine does not form a part of my present invention and as it is also a mechanism familiar to all skilled in the art to which this invention appertains.

Fixed to the outer end of shaft 3 is one end of a coupling 22, to the opposite end being fixed one On the opposite endpoints each side of worm 24 the shaft is mounted for rotation with bearings 25 and 26. Bearing 25 is mounted directly into a holeformed in one wall of the housing 21, and held therein by cover 28 which is fastened by screws, not shown, to housing 21. The bearing 26 is carried inside one end of a cover 29, the opposite end of this cover being fitted with a conventional oil seal. The cover 29 is mounted into housing 21, and held therein by screws, not shown. It will be evident that the purpose of mounting bearing 26 in cover 29 is so that when the cover 29 is removed from housing 21 that the worm 24 and associated parts can be removed thru the hole in the housing formed by removal of the cover.

Co-acting in driven relation to the worm 24 is a worm gear 38, (Fig. 17 it being keyed to shaft 3|, at a point intermediate its ends (Fig. 16). Assembly of the worm gear 30 is made into the housing 21 thru an opening sealed by a plate 32, (Fig. 16). At the center of this plate is positioned a bearing 33, which carries for rotation one end of the shaft 3|. A cover 34 is fastened to the cover 32 by screws, not shown, its purpose being retention of the bearing 33. On the shaft 3|, at one side of worm gear 30, is formed a shoulder, to which the gear is clamped by means of a nut' 35 screwed onto the end of the shaft, the nut clamping the gear 30 to the shoulder thru medium of bearing 33 and a spacer 46. Adjacent the opposite end of the shouldered portion the shaft is reduced in diameter to receive bearing 31, which is carried in a bored out portion of a wall internal of housing 21. Loosely mounted 5 over shaft 3| and extending from bearing 31 is a spacer 38, which abuts at its outer end with the inner face of a spur gear 39, mounted into and keyed to this outer end of shaft 3|. As a means of retention of gear 33 onto the shaft 3|, I have provided a washer 48 fastened to end of shaft by screw 4|. It is evident that as rotation is imparted to shaft 23, that rotation will be imparted driving relation therewith, upon a hub extending from one side of a clutch ring 43, (Figs. 13 and 14). A threaded portion of the ring 43 extends past gear 42, carrying a nut 44 (Fig. 4). which serves as a clamping means to retain the gear. Inside the opposite end of the clutch ring 43, is pressed a clutch member 45. Internal the clutch ring opposite the end having the member 45 are mounted bearings 46 and retainers 41 and A third retainer 50, and bearing 43 are arranged adjacent to the outer bearing 46. Inside of bearings 46 and 48 and carried thereby for rotation is a cam shaft 5|. A nut 52 serves to clamp bearings 46 and 49 with retainers 58, 41, and 48 against the shoulder formed on shaft 6|, adjacent to the inner bearing 46. Bearing 46 is fitted for support into a cover plate 53, fastened by'screws and dowels to housing 21. Continuing past the shaftshoulder adjacent inner bearing 46,.is an enlarged shaft portion to which is keyed a clutch member 54. The outer periphery of member 54 contains a series of engaging steps in which lay rollers 55, (Figs. 15 and 13). On

the opposite side of these rollers from that side co-acting with member 54 is the inner periphery of member 45. Extending into the space between each'pair of rollers are lugs 56, these extending from and forming a part of clutch member 51. mounted for rotation over member 58. Member 58 is keyed to shaft 5|, and abuts at its outer end with a shoulder 59 formed on shaft 5|. This outer end is enlarged in diameter for the purpose of retaining member 51 in its correct longitudinal 60 position. Extending from its outer periphery. on its end opposite that end having projections 56, member 51 contains a shoulder 60. A knockout dog 6| contacts normally with this shoulder and is arranged to be rocked from the dotted free 56 position shown in Fig. 14 to the normal full line engaging position. The further purpose of this dog 6| will be more fully hereinafter described. Mounted for rocking movement inside of a hole in the center of the shaft 5| is a shaft 62, its 60 inner end being fitted with a rectangular hole into which is fitted one end of a pin 63. This pin extends up thru a slot 64, in the shaft 5| and member 58, and is fitted at its outer end into a rectangular notch in the face of member 51. It is evident that when a rocking movement is imparted to shaft 62, that the pin 63 being also rocked will move member 51, about its bearing on member 58, and that this will cause the lugs 56 to first push the rollers 55 into a wedged condi- 10 tion between the co-acting faces of members 54 and 45, and reversely to push them into a free or un-wedged relation. The further purpose of this movement will be more completely described hereinafter.

Keyed to shaft 5|, at its end extending past bearing 49, is a member 65. The portion of the shaft to which this member is attached is reduced in diameter from that diameter onto which the nut 52 is threaded, so that a shoulder is formed onto the extreme outer end of the shaft. Extending from this end of shaft. 5| is the end of shaft 62 opposite that end to which is fitted pin 63. Upon this outer end is keyed a lever 61. Also threaded into this outer end of shaft 62 is a set screw 68, operable to press against one end of a pin 69 Figs. 4 and 13, the opposite end of the pin bearing in a hole in pin 63. It is evident that as screw 68 is tightened that pin 69 will be forced against the pin 63, and that this arrangement will serve as a locking means to retain the pin 63 and to prevent it from working loose. At one point along the outer periphery of member 65 is located a groove for retention of a-coil extension spring 18. One end of the spring is fastened to a pin 1| extending thru and bearing in the sides of the groove in member 65. The other end of this spring is hooked around a pin 12, bearing in the clevis end of lever 61. It is evident that if atension is stored in the spring 18,- that when the dog 6| is pulled from its shown full line position to its dotted position, (Fig. 14), that interfering contact will be broken between the end of the dog and the shoulder 68, and that the spring 18 will then be free to pull the clevised end of the lever 61 towards itself, this action rotating shaft 62 in the direction of the arrows 13, (Figs. 14 and 15), causing the lugs 56 to engage rollers 55 wedging them into contact between the associated surfaces of members 54 and 45. It is now evident that if the gear 42 is receiving rotation from its associated drive mechanism that rotation will be imparted to shaft 5|. It is also now evident that if the dog 6| is again moved to its full line position, (Fig. 14) that contact will again be made with shoulder 68, and that therefore member 51 will be brought abruptly to rest, a slight continued rotation of member 54 then causing rollers 55, thru their contact with the now stationary lugs 56, to recede from driving contact to free contact between the associated surfaces of members 45 and 54. It will also be apparent that this slight continued rotation of member 54 and shaft 5|, after member 51 has been brought to rest will restore the energy to spring 18 that was given out as work when the dog 6| was first moved to its dotted position, (Fig. 14) as when member 51 comes to rest, it also brings pin 63, shaft 62 and lever 61 to rest. The slight continued rotation of the shaft 5|, then thru member 65 and pin 1|, produces the stretching of spring 18 incident to a restoring of its initial tension. The means employed to move the dog 6|, and the further purpose of rotation in shaft 5|, will be more completely described hereinafter.

At the opposite side of the periphery of member 65 from that side having the spring 10, is a smooth circular surface operative for rolling contact with roller 12a. At one point in the circumference a notch 13 is provided, and this notch is so arranged that it will contact with the roller 12-a, when the member 65 is normally at rest. When rotation is imparted to member 65 the roller 12-a rides out of contact with slot 13'and at each single revolution of the member 65 it will again ride into contact with the slot 13. To carry the roller 12a I- have provided pin 14, clevised over the roller at its inner end, and fitted with a pin 15 Fig. 5, on which the roller rides. The opposite end of pin 14 is bored out to receive one end 'key seat located in the adjacent side of pin 14.

of a coil compression spring 16, the opposite end of the spring abutting on the inner surface of a cap 11, the cap being screwed onto the upper end of a retainer 18, which serves as a guide for pin 14 as it reciprocates incident to the action of the 5 roller 12'a in moving in and out of the slot 13. To prevent a turning of pin 14 in its bearing, I have provided a key 19, fitted slidably at its one side into a key seat in the associated bearing surfacejoi retainer 18, and carried tightly in a It will also be evident that the compression load applied by spring 16 on pin 14 can be increased or lessened by loosening or screwing down the cap 11. Retainer 18 is mounted into the upper side -of a cover 68, and held thereupon by screws 8| Fig. 5. A cover plate 82 is fastened by. screws,

. not shown, over a hole in the face of cover.

The purposeof this hole is to enable inspection of roller 1-2-a. Cover 86 is fastened by screws to 20 cover 53, the entire assembly of housing 21, cover 53, and cover 88 being arranged for retention of gear lubricant around the mechanism internal thereof. The further purpose of member 65, associated roller 12--a and the above described action will be more completely described hereinafter.

Carrying the housing 21, and associated parts, is a bed 8| (Figs. 1 and 4).. At the upper side thereof is mounted for reciprocal movement a ta- 90 ble 82, it being supported by guide ways formed in the bed at each side thereof. Adjustable gibs 83 are fastened to'the bed by bolts, not shown, in the conventional manner, the gibs serving as guides for the table incident to its reciprocatory a5 movement. Extendingupward from the table 82, and forming a part thereof, is a motor slide support 84, this being arranged with slide ways for retention in reciprocal relation thereto, of a motor slide 85 (Figs. 1 and 3). Adjustment of the slide 85 in its ways is made thru a gib 86, held to the support 84, and adjusted in relation to the slide in the conventional manner, by screws, not shown.

Fastened to the slide, and carried thereby is an electric motor 81. Extending from the forward end of the motor is the motor shaft, and keyed thereto, are washers 88, between which is keyed a circular saw 89. At the side of the slide 85, opposite the motor, are arranged a series of i serrations. Co-acting with these, and held thereto by a screw 98, is the serrated face of a member 9|. A screw 98, is threaded into slide 85, passing thru a slot in member 9|, so as to enable the slide to be located at varying positions on member 9|. The lower end of member 9| terminates in a clevis, internal of which is fitted the upper end of a link 92. A pin 93 extends thru the walls of the clevis and that associated end of link 92, the link being arranged for rockon ing movement about the pin. This link extends downward thru a. hole 93-a in the table 82, the lower end of which terminates in a pin connection 95, with the outer end of a three armed lever 94, (Figs. 4 and 11). Lever 94 is pivoted 05 for rocking movement about a pin 96, carried in a pair of lugs 91, extending from the associated wall of bed 8| (Figs. 1, 11, and 12). Extending rearward from pin 96 is a second arm of the lever 94, this terminating in a clevis thru which passes a pin 98, carrying one end of a'coil extension spring 99. The opposite end of this spring is fastened to a bar I80, which passes thru internal of the walls of the bed 8|, receiving support in holes bored in opposite sides of the bed,

(Fig. 43). It is now evident that the weight of motor 81, slide 85, link 92 etc., will be counterbalanced by the tension that may be stored in spring 99. Intermediate the pins 95 and 96 is a clevised portion of lever 94, thru the walls of which pass a pin IN on which is mounted for rotation, a roller I02. Co-acting with the face of this roller, is the face of a cam I80, keyed to shaft This cam when receiving rotation is operable to move the arm of lever 94, containing roller I02 upward, raising the slide 85. A third arm of lever 94 extends, bifurcated, downward out from the pivot point, terminating at its outer end ina pair of rollers I03, mounted for rotation on pins I04, pressed at one end into lever 94. These rolls co-act operatively with the faces of a pair of cams I05, (Figs. 4 and 11), keyed to shaft 5|. These cams have similar faces and when receiving rotation from shaft 5|, are operable to move the lever 94 downward, this action lowering the slide 85 with its associated motor. The further purpose of this movement applied to lever 94, will be more completely described hereinafter.

Fastened by screws, I09, to the under side of the table 82, is a rack I06, (Figs. 1, 4, and 6). Directly beneath this and fastened to lugs IIO, extending from the associated walls of bed I, by screws I08, is a second rack I01. Interposed in toothed relation between the two inner faces of the racks is a pinion II I. Clevised around the pinion is the upper end of a lever II2. Clevised around this lever end is a slide 1 I3. This slide bears for reciprocal movement in ways formed at the upper side of the bed 8| (Fig. 4) being retained in these, ways by plates 26I fastened by screws, not shown. This slide serves to support the pinion I II in correct toothed rolling engagement between its associated racks I06 and I01, the slide also supporting the weight of lever II2.

A pin II4 passes thru the walls of slide II3, thru the end of lever H2, and thru pinion III, the pinion being arranged for rotation and the lever I I2 for rocking movement thereupon. The lower end of lever II2 terminates in a threaded portion over which is screwed a sleeve II5, (Fig. 6). The upper end of the sleeve is flanged, the lower end terminating in a shouldered portion to which is pinned a nut II6. Surrounding the sleeve between nut H6, and the flanged upper end, is a bearing block II1 having at opposite sides thereof, a trunnion extension I19. To each trunnion for rocking movement thereupon is mounted'a link II8. Extending each side of the trunnion, an equal distance, the link terminates in pinned connections I20, with the inner ends of levers I2I, each lever being pivoted for rocking movement on pins I22, carried by lugs I23. This linkage consisting of links H8 and levers I2I constitutes the well known straight line motion. It is evident now that if the pinion I II is moved in a straight line, that the trunnions II9 will move along the perpendicular line XX, (Fig. 6). the distance between trunnion H9 and pinion III remaining constant. Intermediate its ends lever I I2 is bifurcated, the two separated members terminating at the top and the bottom of the lever in single portions. portion carries a pin I24, mounted in adjacent walls of the lever, and operable to carry rollers I25 and I26 for rolling motion thereupon. Roller I25 has the two outer edges of its face of one diameter, the center portion being formed a reduced diameter, (Fig. 9). These two outer edges co-act with the faces of a pair of cams I21 keyed Each bifurcated to shaft 5|, (Figs. 4, 6, and 8). The other roller I26 has an enlarged diameter at its center portion which co-acts with the face of cam I28, also keyed to shaft 5I. The arrangement of these cams is such that when shaft 5| is rotated 5' in the direction of the arrow I29, (Fig. 6), that the upper end of lever I I2, with its associated pinion III, and slide II3 will move in the direction of the arrow I30, (Fig. 6). The rack I08 above the pinion being also in toothed engagement will be moved in the direction of the arrow I30 and at twice the speed of the pinion. The cams I21 and I28 are preferably designed so as to impart a uniform reciprocal motion to table 82. Also the cams are arranged to give a gradual l0 acceleration and similar deceleration at either end of its stroke.

Fastened to the table 82 by screws I36 are guides I31 and I38, (Figs. 19 and each guide containing a slideway I39 carrying for reciprocal 20 movement therein a pair of plates I40. A pin MI is pressed into each plate, one end of the pin extending outward, its outer end forming a bearing upon which is mounted for rocking movement one end of each of a pair of links I42 and I43. The outer end of the pin being shouldered for retention of the ends of the links. The opposite end of each link is arranged for rocking movement on pins I44 pressed into lever arms extending from the hub of a lever I45. This lever midway the pins I44 is keyed to the shouldered upper end of a shaft I46, being retained in position thereupon by a lock nut I41. Extending downward, the shaft I46 is Journaled in a bearing formed in the table 82. The opposite .end of this shaft terminates in a bevel gear I48,

having toothed engagement with a second bevel gear I49. Extending back from gear I49 and formed therewith is a shaft I50 Journaled in a bearing bracket I5I, held by screws, not shown,

to the under side of table 82. Extending fromgear I49 at its side opposite shaft I is a second shaft I52, having keyed thereupon one end of a lever I53, being retained by a lock nut I54.-

Into the opposite end of the lever I53 is pressed 45 a pin I55, a projecting end of the pin having mounted thereupon for rotation a roller I56, a head formed on the outer end of the pin serving for retention of the roller. Co-acting with the face of the roller is a cam bar I51 (Figs. 20, 5

4, and 25), pivoted at its one end for rocking movement about a pin I58, (Figs. 1 and 25). fixed into a boss extending from one side wall of the bed 8|. Near the opposite end of bar I51 is formed a clevis portion in which is guided 5 for rotation a roller I59, the roller being carried on a pin I60, extending for bearing support into the adjacent walls of the clevis. Co-acting with the face of roller I59 is the face of a cam IGI, keyed to and receiving driving movement 60 from shaft 5I. It is evident that as the cam I6I is rotated in the direction of arrow I62, (Fig. 25) that the bar I51 will be raised first from its full line position in Fig. 25 to its dotted line position. Then for 100 degrees rotation of the shaft 5| it will dwell in the dotted position, falling again to the full line position in the succeeding 40 degrees rotation cf the shaft, and dwelling in the full line position thru the next 180 degree travel, each cycle of cam operation consuming 360 de- 7 grees rotation of the shaft 5| As the bar I51 is raised. the end of lever I53 connected to roll-' er I56 will also be raised and thru the bevel gears I48 and I49, shaft I46 will be rotated, thus rocking the lever I45 so that link I42 is moved in 

